Improvement in engines tor making paper-pulp



Ilftatn' @atwtittim er Letters Patent No. 86,858, dated Febrero/ry 9,1869.

IMPROVEMENT IN ENGINES FOR MAKING PAPER-PULP.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it may concern:

Beit known that I, WILLIAM, PARKISON, ofMonongalicia Oity, in the countyof Washington, and State of Pennsylvania, have invented a new and usefulImprovement in Engine for Making Pulp for Paper- Making and I do hereby'declare the following to be a full, clear, and exact descriptionthereof, reference being had to the accompanying drawings, and to theletters of reference marked thereon.

'Ihe nature of my invention consists in providing the ordinarypulp-engine. for grinding pulp for paper-making, with a stone base,adapted in form to the cuttingcylinder and its cutters.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

In the accompanying drawings, which form part of my speciication.

Figure 1 is a top view 0r plan of my improvement in pulp-engine.

Figure 2 is a longitudinal section of the same, when cut through at lineY.

In the drawings- A represents an ordinary pulp-tub, provided with theordinary cutting-cylinder j', provided with cutters c, said cylinderbeing placed on a shaft, B, which has its bearings in the timber, X,secured to the sides of the tub A.

The ordinary inclined cutting-block C is provided with a stone block, D,which is fitted into the block C, as shown in iig. 2.

The upper surface of the stone, D, is cut out, so as to conform to thediameter of the cylinderI fand its cutters c, which should have onlyspace enough between them and the stone to pass without rubbing on thestone.

The length of the stone, D, rshould be the same as that of the cylinderf:

The arrows show the course which the material of which the pulp is madetravels in-the tub A, the maf terial and water being used in the usualmanner, and

treated and manipulated in the ordinary way, which in connection withcylinder f and cutters c, as herein described, and for the purpose setforth.

- WM. PARKISON.

Witnesses:

JAMES J. JOHNSTON, R. M. Gnu.

